Acura TSX / Honda Accord CL. Manual — part 173

NO -Go to step 4.

4. Substitute a known-good audio-HVAC subdisplay and recheck.

Does the subdisplay work properly?

YES -Replace the original audio-HVAC subdisplay.

NO -Substitute a known-good audio-HVAC display panel and retest. If the problem is gone, replace the
original audio-HVAC display panel.

SYSTEM DIAGNOSIS MODE

START-UP PROCEDURE AND DIAGNOSIS MENU

1. Turn the ignition switch ON (II).

A. If the battery has not been disconnected, then press and hold Menu, Map/Guide, and Cancel

buttons. Keep them pressed for approximately 5 seconds. The display screen then goes directly to
the "Select Diagnosis Items" menu.

B. If the battery was disconnected and reconnected prior to this test, hold down the Menu and Zoom

Out button. You will see the "Navi System Link" screen. Push the joystick to go directly to the
"Select Diagnosis Items" menu.

NOTE:

This only allows access to the diagnostic screens. All other Navigation
functions are disabled.

2004 Acura TSX

2004 ACCESSORIES & EQUIPMENT Navigation System - TSX

Fig. 57: Select Diagnosis Items Menu Display

2. After the display changes to the select Diagnosis Items menu, touch the item you want to check, and the

check will start. To return to the previous screen, touch "Return".

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Navi System. (Link)

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F-CAN (System Link)

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B-CAN (System Link)

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Monitor Check.

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Unit Check.

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Car Status.

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GPS Information.

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Yaw Rate.

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Tire Calibrate.

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Functional Setup.

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Version.

Navi System Link

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This diagnostic tests the cables connecting the navigation components. Ensure that the ignition switch is
in the ON (II) position. When the diagnostic begins, a "bong" sound is heard. The system is in a
"Detecting" mode, and is waiting for all items in white to be tested. This includes the steering wheel
(TALK/BACK) switches, and microphone, Push the "TALK" button on the steering wheel, and in a
normal voice, say "testing". The Talk indicator on the screen should become green, and the voice level
indicator should move to the 6

th

bar to pass. Next, touch the Steering wheel "BACK" button. This should

2004 Acura TSX

2004 ACCESSORIES & EQUIPMENT Navigation System - TSX

cause the "Cancel" indicator to go green.

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If all of the communication lines connecting the system components, and the steering wheel
buttons/microphone check out OK (all block diagram items green), then the "OK" indicator will become
green.

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If there is a problem with the system, the faulty system component item will change to red, and the screen
will show "NG" in red. Use the troubleshooting index, and other diagnostic screens to help locate the
problem.

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The indication on the screen will not change until the ignition switch is cycled. After repairing the
affected cable or system, repeat this diagnostic.

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NOTE: Green boxes and green "OK" indicate that the communications lines (cables) are intact. This
diagnostic does not necessarily imply that the individual components are functioning properly. For
instance, the GPS antenna wire may be crushed, but still show as "green." A road test, or other diagnostic
may be necessary to find the problem.

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Touch the "Exit Diag" button to exit.

Fig. 58: Navi System Link Display

F-CAN System Link

F-CAN (Fast Controller Area Network) passes information between processors on the network. For example,
the F-CAN network is used to pass fuel pulses between the PCM and the navigation for the trip computer
function. The F-CAN network uses a communication protocol that transmits data at 500 Kbps.

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If the diagnostic screen below reads NG, then diagnostic trouble codes (DTCs) for the F-CAN can be
retrieved with a PGM Tester or HDS (Honda Diagnostic System). The data displayed in the ID boxes is

2004 Acura TSX

2004 ACCESSORIES & EQUIPMENT Navigation System - TSX

for troubleshooting at the factory.

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For more details on troubleshooting the F-CAN, refer to multiplex system.

Fig. 59: F-CAN System Link Display

B-CAN System Link

B-CAN (Body Controller Area Network) communication moves at a slower speed for convenience related
items, and for other functions.

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If the diagnostic screen below reads NG, then diagnostic trouble codes (DTCs) for the B-CAN can be
retrieved with a PGM Tester or HDS (Honda Diagnostic System). The data displayed in the ID boxes is
for troubleshooting at the factory.

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For more details on troubleshooting the B-CAN, refer to multiplex system.

2004 Acura TSX

2004 ACCESSORIES & EQUIPMENT Navigation System - TSX